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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGeoFileImageSource.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/*-------------------------------------------------------------------------
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
#include "vtkGeoFileImageSource.h"
#include "vtkDoubleArray.h"
#include "vtkGeoImageNode.h"
#include "vtkImageData.h"
#include "vtkImageGridSource.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkSmartPointer.h"
#include "vtkStdString.h"
#include "vtkTexture.h"
#include "vtkTransform.h"
#include "vtkXMLImageDataReader.h"
#include <vtksys/ios/fstream>
#include <vtksys/ios/sstream>
#include <vtksys/stl/utility>
vtkStandardNewMacro(vtkGeoFileImageSource);
//----------------------------------------------------------------------------
vtkGeoFileImageSource::vtkGeoFileImageSource()
{
this->Path = 0;
}
//----------------------------------------------------------------------------
vtkGeoFileImageSource::~vtkGeoFileImageSource()
{
this->SetPath(0);
}
//----------------------------------------------------------------------------
bool vtkGeoFileImageSource::FetchRoot(vtkGeoTreeNode* r)
{
vtkGeoImageNode* root = 0;
if (!(root = vtkGeoImageNode::SafeDownCast(r)))
{
vtkErrorMacro(<< "Can only fetch image nodes from this source.");
return false;
}
root->SetLatitudeRange(-270, 90);
root->SetLongitudeRange(-180, 180);
this->ReadImage(-1, 0, root);
return true;
}
//----------------------------------------------------------------------------
bool vtkGeoFileImageSource::FetchChild(vtkGeoTreeNode* p, int index, vtkGeoTreeNode* c)
{
vtkGeoImageNode* parent = 0;
if (!(parent = vtkGeoImageNode::SafeDownCast(p)))
{
vtkErrorMacro(<< "Can only fetch image nodes from this source.");
return false;
}
vtkGeoImageNode* child = 0;
if (!(child = vtkGeoImageNode::SafeDownCast(c)))
{
vtkErrorMacro(<< "Can only fetch image nodes from this source.");
return false;
}
if (parent->GetLevel() == -1)
{
// Child 0 is the dummy western hemisphere, child 1 is the dummy eastern hemisphere
// Child 2 is the western hemisphere, child 3 is the eastern hemisphere
if (index == 0)
{
vtkSmartPointer<vtkImageData> dummyImageWest = vtkSmartPointer<vtkImageData>::New();
dummyImageWest->SetOrigin(-180.0, -270.0, 0.0);
dummyImageWest->SetSpacing(0.0, -90.0, 0.0);
child->GetTexture()->SetInputData(dummyImageWest);
child->SetLatitudeRange(-270, -90);
child->SetLongitudeRange(-180, 0);
}
else if (index == 1)
{
vtkSmartPointer<vtkImageData> dummyImageEast = vtkSmartPointer<vtkImageData>::New();
dummyImageEast->SetOrigin(0.0, -270.0, 0.0);
dummyImageEast->SetSpacing(180.0, -90.0, 0.0);
child->GetTexture()->SetInputData(dummyImageEast);
child->SetLatitudeRange(-270, -90);
child->SetLongitudeRange(0, 180);
}
else if (index == 2)
{
this->ReadImage(0, 0, child);
}
else
{
this->ReadImage(0, 1, child);
}
return true;
}
int level = parent->GetLevel() + 1;
int id = parent->GetId() | (index << (2*level-1));
return this->ReadImage(level, id, child);
}
//----------------------------------------------------------------------------
bool vtkGeoFileImageSource::ReadImage(int level, int id, vtkGeoImageNode* node)
{
// Load the image
node->SetId(id);
node->SetLevel(level);
vtkSmartPointer<vtkXMLImageDataReader> reader = vtkSmartPointer<vtkXMLImageDataReader>::New();
vtksys_ios::stringstream ss;
ss.str("");
ss << this->Path << "/tile_" << level << "_" << id << ".vti";
// Check if the file exists
vtksys_ios::ifstream in;
in.open(ss.str().c_str(), vtksys_ios::ifstream::in);
if (in.fail())
{
// Make a dummy image
in.close();
vtkSmartPointer<vtkImageData> dummy = vtkSmartPointer<vtkImageData>::New();
dummy->SetDimensions(1, 1, 1);
vtkSmartPointer<vtkDoubleArray> scalar = vtkSmartPointer<vtkDoubleArray>::New();
scalar->InsertNextValue(0.0);
dummy->GetPointData()->SetScalars(scalar);
dummy->SetOrigin(node->GetLongitudeRange()[0], node->GetLatitudeRange()[0], 0.0);
dummy->SetSpacing(node->GetLongitudeRange()[1], node->GetLatitudeRange()[1], 0.0);
node->GetTexture()->SetInputData(dummy);
return false;
}
in.close();
// Read the file
reader->SetFileName(ss.str().c_str());
reader->Update();
vtkImageData* image = reader->GetOutput();
// Retrieve the image bounds using origin and spacing
double x1[3];
double x2[3];
image->GetOrigin(x1);
image->GetSpacing(x2);
double lonRange[2] = {x1[0], x2[0]};
double latRange[2] = {x1[1], x2[1]};
node->SetLatitudeRange(latRange);
node->SetLongitudeRange(lonRange);
// Make the texture with the correct transform
vtkSmartPointer<vtkTexture> texture = vtkSmartPointer<vtkTexture>::New();
vtkSmartPointer<vtkTransform> texTrans = vtkSmartPointer<vtkTransform>::New();
// Start with (lat,lon)
texTrans->PostMultiply();
texTrans->RotateZ(90.0); // (-lon,lat)
texTrans->Scale(-1.0, 1.0, 1.0); // (lon,lat)
texTrans->Translate(-lonRange[0], -latRange[0], 0.0); // to origin
texTrans->Scale(1.0/(lonRange[1] - lonRange[0]), 1.0/(latRange[1] - latRange[0]), 1.0); // to [0,1]
texture->SetInputConnection(reader->GetOutputPort());
texture->SetTransform(texTrans);
texture->RepeatOff();
texture->InterpolateOn();
texture->EdgeClampOn();
node->SetTexture(texture);
return true;
}
//-----------------------------------------------------------------------------
void vtkGeoFileImageSource::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Path: " << (this->Path ? this->Path : "(none)") << endl;
}
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